Across
- 2. in its revolution about another
- 3. astronomer who proved that
- 5. existence of the Oort cloud
- 6. a small celestial body composed
- 10. radially from the sun
- 11. orbits, or travels around, the sun.
Down
- 1. nebula
- 3. rock and solar relating to the
- 4. solar syste m consists of the sun and everything
- 5. galaxy is rotating and proposed
- 7. or utilizing the energies of the sun
- 8. the path of a celestial
- 9. wind a stream of protons